/**
 *
 *
 *
 *
 *
 */

package org.sxp.modules.sys.shiro;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.crypto.hash.SimpleHash;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.sxp.common.exception.AppException;
import org.sxp.common.utils.Constant;
import org.sxp.modules.sys.entity.SysUserEntity;

/**
 * Shiro工具类
 *
 *
 */
public class ShiroUtils {

	public static boolean isAdmin(){
		Long userId = getUserId();
		if(userId != null && userId == Constant.SUPER_ADMIN){
			return true;
		}
		return false;
	}

	/**  加密算法 */
	public final static String hashAlgorithmName = "SHA-256";
	/**  循环次数 */
	public final static int hashIterations = 16;

	public static String sha256(String password, String salt) {
		return new SimpleHash(hashAlgorithmName, password, salt, hashIterations).toString();
	}

	public static Session getSession() {
		return SecurityUtils.getSubject().getSession();
	}

	public static Subject getSubject() {
		return SecurityUtils.getSubject();
	}

	public static SysUserEntity getUserEntity() {
		return (SysUserEntity)SecurityUtils.getSubject().getPrincipal();
	}

	public static Long getUserId() {
		Subject subject = getSubject();
		if(subject != null){
			SysUserEntity entity = (SysUserEntity)SecurityUtils.getSubject().getPrincipal();
			return entity != null ? entity.getUserId() : null;
		}
		return null;
	}
	
	public static void setSessionAttribute(Object key, Object value) {
		getSession().setAttribute(key, value);
	}

	public static Object getSessionAttribute(Object key) {
		return getSession().getAttribute(key);
	}

	public static boolean isLogin() {
		return SecurityUtils.getSubject().getPrincipal() != null;
	}

	public static void logout() {
		SecurityUtils.getSubject().logout();
	}
	
	public static String getKaptcha(String key) {
		Object kaptcha = getSessionAttribute(key);
		if(kaptcha == null){
			throw new AppException("验证码已失效");
		}
		getSession().removeAttribute(key);
		return kaptcha.toString();
	}

}
